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Joseph jogs from one end A to the other end B of a straight 300 m road in 2 minutes 30 seconds and then turns around and jogs 100 m back to point C in another 1 minute what are joseph's average speed and velocities in jogging (a) from A to B and (b) from A to C.
From point A to B
Distance covered= 300m
Displacement= 300m
Time taken= 2 min 30 sec
= (2 * 60) + 30 = 150sec
Average speed= Distance covered/ Time taken
= 300/150 =2m/sec
Average velocity= Displacement/ Time Taken
= 300/150 = 2m/sec
From point A to C
Distance covered= 300 + 100 = 400m
Displacement= 300 - 100 = 200m
Time taken= 3 min 30 sec = (3 * 60) +30 = 210 sec
Average speed= Distance covered/ Time taken
=400/210 =1.90m/ sec
Average velocity= Displacement/ Time Taken
= 200/210
= 0.95 m/sec.
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